Two cars involved in an accident at the corners of 46th Ave at 12th Street Friday evening are being linked to the investigation of an Oakland shooting of an unidentified Oakland Police officer Friday, Jan. 25, 2013 in Oakland California.

Photo: Lance Iversen, The Chronicle

Two cars involved in an accident at the corners of 46th Ave at 12th...

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Oakland police cordon off an area near 47th Avenue and East 12th Street, where an officer was shot in the leg after he and his partner confronted a man with a gun. The suspect fled but surrendered, police say.

(01-26) 07:21 PST OAKLAND -- An Oakland police officer was shot and wounded Friday evening, the second officer in the city to be injured by gunfire this week, authorities said.

Witnesses said the shooting happened after a man in a car ran a stop sign, crashed into another car at 47th Avenue and East 12th Street, and ran off. Shortly thereafter, an uncle and his nephew reported that they were shot at a block away by a man who tried to steal the uncle's bicycle.

Moments later, at about 5:50 p.m., an officer confronted a man with a gun. The gunman opened fire, hitting the officer in the leg. The suspect fled on foot and was chased by the wounded officer and his partner, who fired a shot. The suspect wasn't hit but gave up. It was not immediately clear if the suspect was the same man who had fled from the scene of the crash.

The wounded officer, a 13-year department veteran whose name wasn't immediately released, was taken to Highland Hospital in Oakland. His wounds were not considered to be life-threatening, police said.

The shooting happened four days after an undercover officer conducting surveillance was shot in the arm in a confrontation with several men on the 1700 block of Seminary Avenue. Five suspects were arrested.

"We're not going to tolerate being fired upon," said Police Chief Howard Jordan.

Friday's incident began when a 19-year-old man and his sister driving east on East 12th Street in a Chevrolet Impala were hit by a speeding Chevrolet Camaro. The Camaro driver ran a stop sign at 47th Avenue. The impact of the crash caused both cars to spin onto a sidewalk.

The driver of the Camaro had a purplish bruise under his left eye, said the brother, who didn't want his name used. The Camaro driver repeatedly said, "Oh my God" and asked the siblings if they were OK, and then fled when the brother asked him if he had any identification.

A police officer arrived to take a report but then heard gunfire nearby and sped off, the brother said. A man and his uncle came running up and told the brother that a man with a gun had just tried to steal the uncle's bicycle and fired shots. The nephew told the brother that he had "felt a bullet pass by his head."